An identity document is any document that may be used to prove a person's identity. If issued in a small, standard credit card size form, it is usually called an identity card, or passport card. Some countries issue formal identity documents, as national identification cards that may be compulsory or non-compulsory, while others may require identity verification using regional identification or informal documents. When the identity document incorporates a person's photograph, it may be called photo ID.
A Belgian identity card is a national identity card issued to all citizens of Belgium aged 12 years old and above.
A Norwegian passport is the passport issued to nationals of Norway for the purpose of international travel. Beside serving as proof of Norwegian citizenship, they facilitate the process of securing assistance from Norwegian consular officials abroad.
The Swedish national identity card is a non-compulsory biometric identity document issued in Sweden. It is one of two official identity documents issued by the Swedish Police, the other being the Swedish passport. It is only issued to Swedish citizens, and indicates the citizenship.
The Estonian identity card is a mandatory identity document for citizens of Estonia. In addition to regular identification of a person, an ID-card can also be used for establishing one's identity in electronic environment and for giving one's digital signature. Within Europe as well as French overseas territories, Georgia and Tunisia the Estonian ID Card can be used by the citizens of Estonia as a travel document.
Every Polish citizen 18 years of age or older residing permanently in Poland is required to have an identity card issued by the local office of civic affairs. Children as well as Polish citizens living permanently abroad are entitled, but not required, to have one. Identity cards are valid for a period of 10 years.
The Italian electronic identity card, or simply carta d'identità, is an identification document issued to any Italian citizen and to legal aliens, that has been progressively replacing the paper-based identity card since version 3.0 was first released on 4 July 2016. The CIE is intended for both digital and physical identification. The biometric information is printed on an ID-1 card and stored in a contactless chip.
The Identity card of North Macedonia is a compulsory identity document issued in North Macedonia. The document is issued by the police on behalf of the Ministry of Interior.
The Slovak citizen ID card is the identity document used in the Slovak Republic, in addition to the Slovak passport. It is issued to all citizens, and every person above 15 years of age permanently living in Slovakia. It is required by law to hold a valid identity card. A Slovak ID card can be used for travel in all member states of the European Union and the Schengen Area as well as several other European countries and organized tours to Tunisia.
The Bulgarian identity card is a compulsory identity document issued in Bulgaria. The document is issued by the police on behalf of the Ministry of Interior and is the main form of identification on the territory of the Republic of Bulgaria. All Bulgarians are obliged by law to carry their identity cards with them at all times and are subject to fines should they not.
The Swiss identity card in its current form dates back to July 1994. It is in the form of a plastic photocard. It can be used as a travel document when travelling within European Free Trade Association or to the European Union, the European microstates, Georgia, Turkey, and on organized tours to Tunisia.
The Finnish identity card is one of two official identity documents in Finland, the other being the Finnish passport. Any citizen or resident can get an identification card. Finnish citizens will get indication of citizenship on the card. It is available as an electronic ID card, which enables logging into certain services on the Internet, local computers or adding digital signatures into LibreOffice ODF documents or creating DigiDoc formatted containers that also allows encryption during content transfer. ID card is applied at a police station and it is issued by the police.
Maltese identity cards are issued to Maltese citizens. They can be used as a travel document when visiting countries in the European Union and the European Economic Area.
The Cypriot identity card is issued to citizens of Cyprus. It can be used as a travel document when visiting countries in Europe, as well as French overseas territories, Montserrat and Georgia. This document is not valid in Turkey.
The Slovenian identity card is issued to Slovenian citizens. It can be used as a travel document when visiting countries in Europe, as well as Georgia, French overseas territories, Montserrat and organized tours to Tunisia.
The Liechtenstein identity card is issued to Liechtenstein citizens by the Immigration and Passport Office in Vaduz. The card costs CHF65 for adults aged 18 or over and is valid for 10 years. For children, the card costs CHF30 and has a validity of 3 years.
The Greek identity card is the official national identification document for Greek citizens. It is issued by the Hellenic Police.
National identity cards are issued to their citizens by the governments of most European Economic Area (EEA) member states, the exceptions are Denmark and Ireland. Ireland however issues a passport card which is a valid document in the EEA and Switzerland. Denmark issues simpler identity cards that are not valid as travel documents. From 2 August 2021, new identity cards are harmonized as a common identity card model replaced the various formats already in use. There are approximately 200 million national identity cards in use in the EU/EEA, including 53 million of the new EU-standard cards. They are compulsory in 15 EEA/EFTA countries, voluntary in 11 countries and in 5 countries they are semi-compulsory. Where the card is compulsory, in some member countries it is required to be carried at all times, while in other countries the mere possession of the card is sufficient.
The Norwegian identity card, commonly referred to as the national identity card in Norway, is a non-compulsory biometric identity document issued since 30 November 2020. It is one of two official identity documents issued by the Norwegian Police Service, the other being the Norwegian passport. It is only issued to Norwegian citizens, and may indicate citizenship so that it can be used as a travel document facilitating freedom of movement within the European Free Trade Association and the European Economic Area. For travel within the Nordic countries no identity documentation is legally required for Nordic citizens due to the Nordic Passport Union.
The Icelandic identity card, is an identity document issued by Registers Iceland since 12 April 1965. It is one of three official identity documents issued by the Icelandic Government, along with the Icelandic passport and Icelandic driving license. It is voluntarily issued to Icelandic citizens, regardless of age. It is valid in the Nordic countries as travel and identification documentation. Due to its lack of security features it cannot currently be used as a travel document to other countries in the EU/EEA. Identity documents are not compulsory in Iceland. An electronic ID is issued separately to the regular ID card.
Croatia 
